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BOLT. No. 305,294. Patented Sept. 16, 1884.

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M ATTORNEYS I INITED STATES P TENT OFF CE.

ABRAHAM CORN, OFBROOKLYN, NILWV YORK.

BOLT.

EPECIFICATION forming part of Letters Patent No. 305,294, datedSeptember 16, 1884.

I Application filed April 10, 1884. (X0 model) To aZZ whom, it mayconcern-- Be it known that I, ABRAHAM CORN, a citizen of the UnitedStates, residing at Brooklyn, in the county of Kings and State of NewYork, have invented new and useful Improve merits in Door-Bolts, ofwhich the followingis a specification.

This invention relates to means for operating door-bolts; and itconsistsin the novel features of construction hereinafter described,whereby such bolts are rendered self-acting and are adapted to be firmlylocked either in a closed or open position, in addition to being capableof retraction by means of a key.

In the accompanying drawings, Figure 1 is a front view of my bolt whenin a closed 130' silion. Fig. 2 is a similar view thereof when in anopened position. Fig. 3 is a rear View, and Fig. 4 a top view, of thesame when in a closed position. Fig. 5 is a cross-section on the linexa:of Fig. l; and Fig. 6, a similar section on the line y 'J, Fig. 1.

Similar lcttersindicate corresponding parts.

Ihe letter A designates the bolt proper,

which is fitted into guides 13 B, secured to a ency to impel the same inthe direction of the arrow shown in Fig. 1, causing it to engage akeeper, G, and thus assume a closed position, the free end of the boltbeing beveled, so that it may be displaced by thekeeper in shutting thedoor. In the guide B are two apertures, o, coinciding with each other,and in the bolt is an aperture, 8, which registers with theguide-apertures when the bolt is in a closed position and is adjacent toone edge of the guide when the bolt is in an opened position, so thatwhen the bolt is in a closed position a pin, E, may be inserted in theapertures of both the guide and bolt, as shown in Figs. 1 and 5, whilewhen the bolt is in, an opened position this pin may be inserted in thebolt aperture alone, as shown in Fig. 2, thus locking the bolt in eitherposition. The lockingpin E is fitted to the apertures 03, and isconnected to the bolt by a chain, '5, to obviate its loss ormisplaceincnt. On the bolt A is a pin, f, projecting throughaslot, g,which is formed in the back plate, 0, in the plane of the bolt, so thatthis pin and slot not only regulate the positions of the bolt, but alsoprevent it from rotating, which is cssentialto its correct operation.The back plate, 0, carries a dog, J, which is adapted to engage the pinf of the bolt, and is constructed with holes Z, to receive a suitablekey, so that an oscillating motion may be imparted to the dog by meansof the key, for retracting the bolt.

In applying the bolt to a door, the dog J is arranged in proper relationto a key-slot in a rotating spindle, N, which is inserted in the door atthe proper place.

What I claim, and desire tosecure by Letters Patent, is

A door-bolt. consisting of the back plate, 0, having the attached endguides, B B, the-latter constructed with coincident apertures 0 0, thesliding and non-rotating bolt A, having its ends arranged in the guides,and provided with the transverse aperture 8, the removable andreplaceable pin E, adapted to pass through the bolt and the aperturedguide when the bolt is shot forward, and to pass through the bolt alon eand bear against the inner edge of \VILLIAM MILLER.

